| i would say that you can put the filter where you like, as long as the water going in is clean of particulate matter. to me it seems like a trickle tower, water droplets in at the top over media, water and air runs over a substrate that holds bacteria. so it aerates and strips carbon dioxide - degasses.
the bacteria convert the wastes via ammonia cycle to nitrite and nitrate, ph will usually become lower as it uses up calciums.
if you found that the oxygen was lacking in your water because you had it splashing away somewhere hidden and not directly on the pond then you would aerate it again. thats all. it shouldnt make a difference. the thing to be rememebered is that water should be mechanically filtered of its waste particles before sending it to a biological filter or it clogs and loses its surface area for bacteria.
im not trying to sell the things but stainless is good because nothing sticks to it as with plastics. i dont see any figures on its surface area per sq meter of the media though...i think this should be advertised. |